include reactions at the injection site, weight gain, swelling of your hands and feet, and vision changes. other serious side effects include low blood sugar and low potassium in your blood. get medical help right away if you experience serious allergic reactions, body rash, trouble with breathing, fast heartbeat, sweating, or if you feel faint. i would have started flexpen sooner, but i thought it would cost more. turns out it's covered by my insurance plan. thanks to flexpen, vial and syringe are just a memory. ask your doctor about novolog mix 70/30 flexpen, covered by 90% of insurance plans, including medicare. find your co-pay at myflexpen.com. why they have a raise your rate cd. tonight our guest, thomas sargent. nobel laureate in economics, and one of the most cited economists in the world. professor sargent, can you tell me what cd rates will be in two years? no. if he can't, no one can.